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Red Hat Enterprise Linux 7: RHSA-2020-4062-01 Kernel-RT Security Update

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
Significant kernel-rt patch tackles urgent security vulnerabilities in Red Hat Enterprise Linux. Key repairs outlined.
An update for kernel-rt is now available for Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Summary

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: use-after-free in sound/core/timer.c (CVE-2019-19807)
* kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)
* kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free (CVE-2018-20836)
* kernel: out of bounds write in i2c driver leads to local escalation of privilege (CVE-2019-9454)
* kernel: use after free due to race condition in the video driver leads to local privilege escalation (CVE-2019-9458)
Space precludes documenting all of the security fixes in this advisory. See the descriptions of the remaining security fixes in the related Knowledge Article:
https://access.redhat.com/articles/5442481
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory security issue local privilege escalation DoS important red hat enterprise kernel-rt

References

https://access.redhat.com/security/cve/CVE-2017-18551 https://access.redhat.com/security/cve/CVE-2018-20836 https://access.redhat.com/security/cve/CVE-2019-9454 https://access.redhat.com/security/cve/CVE-2019-9458 https://access.redhat.com/security/cve/CVE-2019-15217 https://access.redhat.com/security/cve/CVE-2019-15807 https://access.redhat.com/security/cve/CVE-2019-15917 https://access.redhat.com/security/cve/CVE-2019-16231 https://access.redhat.com/security/cve/CVE-2019-16233 https://access.redhat.com/security/cve/CVE-2019-16994 https://access.redhat.com/security/cve/CVE-2019-17053 https://access.redhat.com/security/cve/CVE-2019-17055 https://access.redhat.com/security/cve/CVE-2019-18808 https://access.redhat.com/security/cve/CVE-2019-19046 https://access.redhat.com/security/cve/CVE-2019-19055 https://access.redhat.com/security/cve/CVE-2019-19058 https://access.redhat.com/security/cve/CVE-2019-19059 https://access.redhat.com/security/cve/CVE-2019-19062 https://access.redhat.com/security/cve/CVE-2019-19063 https://access.redhat.com/security/cve/CVE-2019-19332 https://access.redhat.com/security/cve/CVE-2019-19447 https://access.redhat.com/security/cve/CVE-2019-19523 https://access.redhat.com/security/cve/CVE-2019-19524 Read the Full Advisory

Package List

Red Hat Enterprise Linux for Real Time for NFV (v. 7):
Source: kernel-rt-3.10.0-1160.rt56.1131.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.rt56.1131.el7.noarch.rpm
x86_64: kernel-rt-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-debug-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-trace-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-1160.rt56.1131.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-1160.rt56.1131.el7.x86_64.rpm
Red Hat Enterprise Linux for Real Time (v. 7):
Source: kernel-rt-3.10.0-1160.rt56.1131.el7.src.rpm
noarch: kernel-rt-doc-3.10.0-1160.rt56.1131.el7.noarch.rpm
x86_64:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:4062-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4062
Issue date: 2020-09-29

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security issue local privilege escalation DoS important red hat enterprise kernel-rt

Relevant Releases Architectures

Red Hat Enterprise Linux for Real Time (v. 7) - noarch, x86_64

Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64

Bugs Fixed

1427551 - mm/swap: Convert to percpu locked

1707796 - CVE-2018-20836 kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free

1745528 - CVE-2019-15217 kernel: null pointer dereference in drivers/media/usb/zr364xx/zr364xx.c driver

1747216 - CVE-2019-15807 kernel: Memory leak in drivers/scsi/libsas/sas_expander.c

1757368 - CVE-2017-18551 kernel: out of bounds write in function i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c

1758242 - CVE-2019-17053 kernel: unprivileged users able to create RAW sockets in AF_IEEE802154 network protocol

1758248 - CVE-2019-17055 kernel: unprivileged users able to create RAW sockets in AF_ISDN network protocol

1759681 - CVE-2019-16994 kernel: Memory leak in sit_init_net() in net/ipv6/sit.c

1760100 - CVE-2019-15917 kernel: use-after-free in drivers/bluetooth/hci_ldisc.c

1760310 - CVE-2019-16231 kernel: null-pointer dereference in drivers/net/fjes/fjes_main.c

1760420 - CVE-2019-16233 kernel: null pointer dereference in drivers/scsi/qla2xxx/qla_os.c

1774988 - CVE-2019-19046 kernel: Denial Of Service in the __ipmi_bmc_register() function in drivers/char/ipmi/ipmi_msghandler.c

1775015 - CVE-2019-19063 kernel: Two memory leaks in the rtl_usb_probe() function in drivers/net/wireless/realtek/rtlwifi/usb.c allow for a DoS

Read the Full Advisory

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